| September | 1964 | Established. |
| May | 1966 | Company name changed New Japan Marine Co.,Ltd. |
| September | 1970 | Moved to Aritaki-cho, Ise City. Completion of the first factory. |
| October | 1971 | Completion of the second factory. |
| March | 1976 | Expanded and reconstructed the first factory into a large ship assembly yard. |
| January | 1990 | Began production of Japan's largest class FRP 32M passenger ship (152 gross tons), completed in July of the same year. |
| April | 2002 | Concluded a contract with Yamaha Motor Co., Ltd. for the manufacture of pleasure boats. |
| March | 2006 | Concluded a contract with Toyota Motor Corporation for the manufacture of pleasure boats. |
| February | 2008 | Completion of the third factory. |
| March | 2009 | PONAM-28L" (Commissioned by Toyota Motor Corporation) won the Japan Boat of the Year 2008 Grand Prix. |
| July | 2011 | Raicho 1" (commissioned by Tokyo University of Marine Science and Technology) wins the Ship of the Year 2010 Small Passenger Ship Award. |
| August | 2011 | Construction of approximately 640 small Japanese-style boats and small fishing boats as part of an earthquake reconstruction project for areas affected by the Tohoku earthquake (March 11, 2011). |
| March | 2012 | PONAM-35" (Commissioned by Toyota Motor Corporation) won the Japan Boat of the Year 2011 Grand Prix. |
| November | 2014 | Meiwa Plant opened in San Oyodo, Meiwa-cho, Taki-gun (later closed in November 2020). |
| March | 2015 | PONAM-31" (Commissioned by Toyota Motor Corporation) won the Japan Boat of the Year 2014 Grand Prix. |
| April | 2015 | Oita Factory (New Japan Marine Kyushu Co., Ltd.) established in Shimohara, Aki-cho, Kunitachi, Oita Prefecture. |
| October | 2015 | Concluded a manufacturing contract with the Ministry of Defense for the delivery of 11m type workboats and 7.5m RHIB. |
| March | 2017 | Japan International Cooperation System (JICS) Delivers three of ODA 11m Traffic Boats to Marshall. |
| April | 2018 | Crown Agents Japan Delivers 15 ODA Patrol Boats to Kenya. |
| October | 2020 | Oita Operations Certified for MICHIBIKI Demonstration Experiment by Cabinet Office; Patent Acquired for GPS MICHIBIKI Vessel Positioning System. |
| March | 2023 | "NSB335" won the Japan Boat of the Year 2022 Mid-Sized Boat Division Award. And "Automatic Takeoff and Landing System" won the Japan Boat of the Year 2022 Special Award. |